Process of making electrodes.



earners oracion web WILLSON E. RWLEY, 0F ST. LOUIS, MIISSUURI.

recense or Mimmo macarons:

Bilo Drawing.

To all 'whom t may concern: l

Be it known that I, WiLLsoN H. Romney.' a citizen of the United States,`and resident of. St. Louis,-llissouri, have invented certain new anduseful improvements in cesses of Making' Electrodes, of which thefollowing is a specification containing a full, clear, and exactdescription.

This invention relates to theprocess of applying and drying the leadoxid, paste iiller of active material to the grids or' frames ofelectrodes or battery plates and has, for its object to render theprocess more expeditious, economic and with a minimum o Waste or los inproducing unmarket able' electrodes.

lt is well known in the art that in the y pasted or Faure electrodeorbattery plate certain solutions, compounds or substances, suolias'ainmonium solfato, mag;- nesium sulfate,-suluric acid andthe like,are employed in the making of ille lead oxidy pask or filler of activematerial, which serves to dilate the oxid particles or mass to furtherporosity or acceleration as Well as to serve as a particle bindingmedium, and as a rnedium'for cementing tbe paste or mass to the grid orplate.

By the employment of such solutions, compounds and substances in a.paste'filler baying lead oXid as a. base, certain deleterious,undesirable reactions occur, which are dificult to control.

The dilierent lead oxids, with their variable characteristics, whenmixed with solutions, compounds and the like named, pro# duce a varietyoi formations from an open loose mass of high porosity to a., compact,

' uniformly moist dense, concentrated mass o low porosity that reactdiierently, certain 'formations being; excessively active' and of shortlife and other formations being slow, sluggish or stubborn to becomeactiye in anelectrolyte. Then too in drying methods in Vogue wherein thepaste ller is put to dry in a condition throughout,A checking andfalling out or dislodgment results from shrinkage ofthe filler. That is,there is separation in the mass as well as mass separation from itssupport.

Instead-of employing1 with my leadomd, to reduce it io paste orna,Asuola chemicals, solutions and compounds as are-now employed in the art,l employ water, or when the nature oi lead od used rcquires' employ anyof tbc hewn accelerators -or dile- Specicaton of Letters Patent.

Prol Isorptiv'e or bibulousl qualities for 'tbe fallen out killer, andwith.` shown and rammed om. i2. isis;

appiieaiion'sieaapru 5, wie' aerienne'. lacca.

tors such as sulfuric acid, ammonium sulfate and the like. DHowever,with the more amorphous format-ions of the lead oxide/as producednodilating medium is necessary and tbe plain water is used simply toreduce it to paste form. This paste of a uniformly moist condition isthen pasted to the grids,l frames or plates, and While still moist'their surfaces are placed against matcrial'ofiiib.- @s

pose of taking up the excess rxoistiire troni? the surfaces.' Bypreference allison stripoiA cloth, between folds of which a nuillofpasted grids are placed and tliensnbject thisv 7@ number of grids withthe strip of clothto pressure, which not only facilitates the absorptiveaction of the". cloth but tends to. more uniform distribution of tbepaste in the grid. li desired, this absorptiye or bibulous material maybe provided with a corrugated surface. to produce upon the paste. anondulato surface which will have quicker- Vaction in the electrolyte, orl may produce an uneven surface of any ornate design on the paste byusing the cloth and a, die bearina,f in relief the design desired. Theplates after haring the excess moisture absorbed from their surfaces arethen dipped or treated momentarily in a batb, 4preiiarably a 'e sulfuricacid solution, which permeates ory enters that portie of tbe paste,only, from Wliichtbe moistur has been absorbed, and forms with suchmoisture ridden paste, when exposed to time atmosphere, ai temporarycompact layer,I Whose function'is to'sustain or support tbe paste thegrids or electrode frames iorevenaiiia, too rapid dry ing". thus.withholding .tbe paste against dislodgment from tbe rame as well as toolivi 4ate checking, which ordinarly results from 'too rapid suri'acedrying.

,During the drying process compact layer formed-by tbe momentary dippingor treating in sulihiric acid solution o r other bath, is soitened by anabsorption oi the acid in the body oi' the paste ller and lience thecommercial electrode made in accordance with my process is free fromclieclrs and M95 dependable elcctrolytio action.

l. The proce of making electrodes ivbicli consistsio filling; tbeelectrode plate active material 'in the form of paste, taking up,byabsorptiomtbe excess moisture from the surfaces only-'o the activematerial and applying pressure to expedia@ the ahsory limi nml imuniformly dispose the active iiizierizil in the plzi.

The method of making Electrodes,

which consists in. irst, applying no zi, suit-l able frame, a izisecmuprising an @Kill of lend. shroud, in partially eliminaling the moiure ifroir the surfen-Qs mily of the hasta third, treating' thepartially moisi ridden si1i^'l":ir:e:-1 i0 :i hath oir :i snliilion 0l'sulfuric acid. whereby to prmlilc@ zi compact lag/'vr whiffh prveh lof)rnpiil drying of lle pusif, ohriuiiiug "clxeclis" null 'lnlling 0i: th@piise from its immo.

Il. The procefs al imikiug ilcfgrodfes,

which consists .in filling' the electrode plaine with actireiuiiterialin the form of hasta, partially eliminating the moisture 'from bheSurfaces finly of the active mnt-@rial und chilniiuzilly treating; thepartially moist riflleri surfaces to .render them more Compa@ than theremining; active material,

lil "osimony whereof, l have signed my iiiiiiwlo this specilicziuion, inpresence of iw@ suhsizrihi'igg' witnesses.

WILLSUN .l-l. ROWLEY.

Witnesses:

il). L. Enma l. (l. Omvm.

